Study of fragmentation impact of small riverbeds by artificial waters on the quality of water resources

Purpose. Study the spatial distribution of artificial reservoirs in Dnipropetrovsk region and fragmentation impact small riverbeds on changes quality water resources. Methodology. Field studies current state river basins were carried out, rivers selected principle different geographical location levels anthropogenic impact. Analytical laboratory salt composition methods mathematical analysis used to establish dependence coefficients mineralization level basin flow regulation. Findings. The structure administrative districts their hydrological characteristics are generalized. It is shown that volumes accumulated relation total area cause intensive heating evaporation water. Due this, hydrochemical parameters worsen, which affects environmentally safe use. was found mineralization, content sulphates chlorides exceed maximum acceptable concentrations all studied rivers. There a tendency deterioration block, especially with significant regulation reservoirs. In this case, salinity exceeds norm by 712 times. Indicators fewer ponds less standards 25 Originality. determined among main factors aquatic ecosystems reservoirs, turned into cascades evaporating ponds. close relationship between (coefficient determination R2 =0.62), as well coefficient (R2 = 0.61). This proves possibility, conditions research rivers, estimate degree change (increase) Kw Practical value. directions ways normalize ecological status watercourses given. necessity systematic study condition determined.